Allow eval/arguments in arrow functions

src/parser.h

Index: src/parser.h
diff --git a/src/parser.h b/src/parser.h
index a985d71e984aad23a1ae14fab423dc2eaf54b965..3b3144e0619f37e2d3d1e80703bcdbbcb46fd664 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -696,7 +696,6 @@ class ParserTraits {
   static Expression* EmptyExpression() {
     return NULL;
   }
-  static Expression* EmptyArrowParamList() { return NULL; }
   static Literal* EmptyLiteral() {
     return NULL;
   }
@@ -746,11 +745,6 @@ class ParserTraits {
   V8_INLINE Scope* NewScope(Scope* parent_scope, ScopeType scope_type,
                             FunctionKind kind = kNormalFunction);
 
-  // Utility functions
-  int DeclareArrowParametersFromExpression(Expression* expression, Scope* scope,
-                                           FormalParameterErrorLocations* locs,
-                                           bool* ok);
-
   bool DeclareFormalParameter(Scope* scope, const AstRawString* name,
                               bool is_rest) {
     bool is_duplicate = false;
@@ -764,6 +758,14 @@ class ParserTraits {
     return is_duplicate;
   }
 
+  void DeclareArrowFunctionParameters(Scope* scope, Expression* expr,
+                                      const Scanner::Location& params_loc,
+                                      FormalParameterErrorLocations* error_locs,
+                                      bool* ok);
+  void ParseArrowFunctionFormalParameters(
+      Scope* scope, Expression* params, const Scanner::Location& params_loc,
+      FormalParameterErrorLocations* error_locs, bool* is_rest, bool* ok);
+
   // Temporary glue; these functions will move to ParserBase.
   Expression* ParseV8Intrinsic(bool* ok);
   FunctionLiteral* ParseFunctionLiteral(
@@ -1060,8 +1062,6 @@ class Parser : public ParserBase<ParserTraits> {
   ScriptCompiler::CompileOptions compile_options_;
   ParseData* cached_parse_data_;
 
-  bool parsing_lazy_arrow_parameters_;  // for lazily parsed arrow functions.
-
   PendingCompilationErrorHandler pending_error_handler_;
 
   // Other information which will be stored in Parser and moved to Isolate after